Q: On a current kitchen remodel, the sink has an S-trap instead of a P-trap, which my plumber says does not meet code. This will result in an open airway from the sewer lines up through your sink which will allow noxious sewer gases to enter your home. Looking at the p trap that is not glue-together, the sweep is on the drain side, but look at the image i uploaded, the height to the j-bend does not apply in my case since one side of the p trap is not higher than the other. Any expert guidance would be much appreciated. ✦ Bottle Trap:Unlike t… Sarasota FL Home Inspector | Direct Inspections | 941-251-1000, Copyright © 2020 - Direct Inspections - All Rights Reserved, Proudly Serving Sarasota & Manatee Counties. Another potential problem is that when draining, other plumbing units can cause a vacuum that will suck the water out of an S-trap. A P-trap works with a vent to equalize air pressure and allow the trap to remain full of water. The setout of S-trap is the distance from the wall to the centre of the waste pipe in the floor. A p-trap can be used weather the drain line comes from the floor or the wall. It is recommended to run all plumbing fixtures at least monthly in order to make sure that there traps remain full of water. A: John Smith, a licensed plumber in Harwich, Mass., responds: Your plumber is correct in his assessment. He can then either tie into an existing vent or run a new vent up through a stud bay and through the roof. The horizontal run of a P-trap allows water to drain and air to move in the pipe to maintain the trap seal. Also, a P-trap is probably better if you have a choice-- S-traps can siphon dry even when apparently vented properly (you want some water to remain in the trap at all times to prevent unpleasant--and possibly dangerous-- sewer/septic gas from rising up through the pipes). S-Trap or P-Trap. It is used to connect two vertical pipes. In simplest terms, an S-trap is shaped like an “S” and a P-trap is shaped like the letter “P” if both are lying on their side (see S-Traps Vs. P-Traps, below). Connection of a trap into another trap should not be practiced. There is no "J" trap but a "J" bend,(see image) is the removable part of a "P" trap. InterNACHI® is a registered trade­mark of the Inter­national Association of Certified Home Inspectors Before discussing the drawbacks to an S-trap, we first need to understand how sink traps operate. As water flows from the sink into the drain, air is pushed out of the pipe via the vent. The only difference between a P-trap and an S-trap is the horizontal length of pipe on the outflow side which allows you to connect the vent. This image shows s-trap vs p-trap. The typical P trap looks like a P if you envision the flat section of the letter P horizontally. When it comes to replacing a P trap in your bathroom or kitchen, making the wrong choice may result in your having to replace the new P trap again, sooner than you would like. The design of a P-trap will keep the required amount of water is … ✦ S-Trap:The s-trap, as the name suggests, has two oppositely curved sections, which together form an ‘S’. Take the letter P and turn it 90 degrees clockwise. Even if you have P-traps installed, the water in the trap can dry out over time if the sink is not used. So a 1 inch 1/2 trap can only be 6ft from the vent. Cause there's on 6 1/4 inches in 1 inch 1/2 trap. The trap (and drain) can’t work properly without a properly installed vent in the system (see “Plumbing Vents Explained,” Jun/99). >E-mail Removed< Here you go! Said it’s actually a p-trap, because the vent is within 5 feet of the weir. And turn it 90 degrees clockwise flows from the vent to be able to a! 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